For Manchester United this summer looks likely to see the sale of Mason Greenwood, here’s why that is a smart move according to data. For Mason Greenwood, a season on loan with Getafe has done a world of good for his footballing career which seemed finished 12 months ago. The Manchester United forward has eight goals and six assists in 29 games in La Liga this campaign which has sparked a race for his signature this summer, despite a contract extension. A return to Old Trafford has been ruled out, while interest is mounting from Atletico Madrid, Juventus and various other clubs including two P…